Device for stopping delivery in spinning and twisting machines on the breaking of the thread



Dec. 23, 1930. J. VON TRUMBACH 1,786,275

DEVICE FOR STOPPING DELIVERY IN SPINNING AND TWISTING MACHINES EA BREAD ON THE BR File un KING OF E T 6 20, 1 29 yra/y-Zi-hv I 20 thereof.

the roughened or toothed faces Patented Dec. 23, 1930 UNITED STATES PATENT OFF-ICE" JOHANNES vol 'rnii'nacn, 0F DUSSELDOBF-OBEBKASSEL, GERMANY DEV ICE FOB STOPPING- IDE'LIVEBY IN SPDTNING AND TWISTING MACHINES ON THE- BREAKING OF.

Application filed June 20, 1929, Serial No.

This invention relates to a device for stopping delivery in spinning and twisting machines in the event of breaking of the thread.

The invention has reference to tra de- 5 vices 'for this purpose, of the type em odying a pair of co-operating gripping members situated between the creel and delivery roller, and operatively connected'to a trip memher, which, under tension of the moving threads acting thereon, maintains the gripping members in such relative positions as to permit the threads to ass freely between them under normal worEin conditions, said trip member being release in the event of breakage of the thread between the deliver rollers and indle, and when so release permittin re ative movement of the grippeing mem ers into position to grip the thread tween them and so prevent further delivery Suggestions have previousl been made in trap devices of this type to ut' as the gripping members a pair of rollers one eccentrically mounted, so that when turned it moves towards the other into the gripping position,

or a roughened or toothed roller in conjunction with a pivoted lever also having a roughened or toothed coacting surface, the

lever being swung towards the roller to bring to ether in the qua rants provided with eccentrically disposed teeth, the quadrants, during normal operation, being out of mesh but moving into awtoothedrengagement to grip thetthread when a breaka e thereof occurs.

An ob ect of the invention is to ensure against any likelihood of irregular functioning of the gripping members by providing for positive action thereof.

A further object of the invention is the provision of a trap device in which the tra ping elements are so related that when in re ation to provide 'a trap ing fimction incident to the breaking of the t read, an tendency to a continued drawing of the t ad through the trap is revented by the fact that such drawing tensency serves of itself to increase the holding efiect of the trap. Thus a disadvantage of prior structuresof this type is ippingposition, or a pair 0? toothed THE 'rnam 372,395, and 111 Germany June 22, 1928.

traps-do not prevent passage of the thread under a suflicient pull and thus there is great liability of loss of thread incident to the winding of the roving about the delivery roller, whereas in the present invention the trap operates with increasing holding function under increasing pull on the thread by the delivery roller, any possible tendency to a continued feeding of the thread after it has been broken is entirely avoided.

The present invention comprises a device of the type set forth for stopping delivery in twisting and spinning machines on the breaking of a thread between the. delivery roller and spindle, wherein the gripping members situated between the creel and the delivery roller are geared together so as to remain always in mesh,and while permitting of the free passage of the'threads between them during normal working of the machine, are constrained by their positive connection to move together to grip the thread between them when one is operated by release of the trip which occurs on breakage of the thread.

As will be readily appreciated, loss of ma- I terial due to formation of lap or lap licking is thus avoided.

The invention includes the provision of grippin members in the form of rollers provid with constantly interengaging teeth which grip the thread when a breakage thereof occurs and with co-oper'ating recesses for allowing free passage of the thread under normal working conditions.

The accompanying drawings illustrate by way of example one construction of device provided according to the invention for stopin deliver in twistin and s inni mahi es whenzz thread breaks. P

Figure 1 shows the device with the trip held in raised position by the taut thread, the thread that passes from the creel to the delivery rollers being guided through the recesses in the gripping cylinders. I

- Figure 2 shows thetri that drops under its own weight imme' 'ately, the thread cal breaks, with the gripping cylinders in the thread-gripping position,

Figure 3 is a section on the line I-II of Fig. 2, and

Figure 4 is a front view of the grippmg cylinders in the position indicated in Figure 1.

The feeler of the device according to the invention is provided by the known movable trip a, or knocking oii motion, which is held in the raised position shown in Figure 1, by the portion of thread of the roving between the delivery roller and the spindle (not shown) so long as that part of the thread is unbroken and, therefore, taut. Immediately this portion of the thread breaks, the trip (1 drops under its own weight into the position shown in Figure 2. This movement of the trip actuates a gripping device immediately the thread breaks. The gripping device con sists of two gripping cylinders 7), b situated between the delivery roller and the creel h The trip a is directly connected to one of these gripping cylinders, as b, so that in the movement of the trip the gripping cylinder is correspondingly turned. The cylinders are provided with interengaging teeth and have recesses 2' extending half the length of the two cylinders. The thread of the roving between the creel It and the delivery "rollers 9 can pass freely between the gripping cylinders b, 6 because of the recesses i, so long as the gripping cylinders are in the position shown in Figure 1. If, however, the thread breaks between the delivery roller and the spindle the trip a will drop and cause gripping cylinders 12,, b to rotate by reason of their inter-engaging teeth until the roving is firmly gripped by the wide teeth at the point where the recesses 2' commence, as shown in.'Figure 2.

When the thread breaks and the stopping device according to the invention, has come into operation, the attendant lifts the trip a with the right hand, thereby turning the gripping cylinders b, 5' back until they are held by the pawl c engaging in the recess a? in theupper cylinder 1). The thread f is thus released and is drawn round the delivery cylinder g as shown in Figure 1. While the spindle is heldagainst rotation by knee brakes or the like, the thread can be tied and the trip a suspended in position in the usual manner and thus held in the raised position by the taut thread. The pawl 0 is then withdrawn from the recess d in the upper gripping cylinder 6 and work is resu ed.

I claim:

1.v A device of the type hereinbefore set forth for stopping delivery in twisting and spinning machines in the event of a break in the thread between the spindle and the delivery roller,'comprising a pair of gripping rollers, said rollers having constantly interengaging teeth and peripheral recesses, means controlled by the thread for normally holding said rollers in such relation that the recesses are opposite to one another and the thread passes freely through them, and when the thread breaks said thread controlled means operates said rollers so that the recessed portions are removed from the thread which is gripped between the teeth substantially as and for thepurpose hereinbefore set forth.

2. In a trap motion, thread gripping devices comprlsing intergeared cylindrical members, a portion of the periphery of each member being cut away to cause the cut away portions to define an open channel between the members for the passage of the thread when the members are in a predetermined position, and means for compelling relative movement of the members on the breaka e of the thread to present the peripheral sur aces of the members in gripping contact with the thread.

3. In a trap motion, thread gripping devices comprising intergeared cylindrical members, a portion of the periphery of each member being cutaway to cause the cutaway portions to define an open channel between the members for the passage of the thread when the members are in a predetermined position, and a trip connected to one of the members and held by the thread when intact.

to maintain the members in position to permit the passage of the thread between them, said trip when released by the breaking of the thread serving to relatively operate both members through their intergeared connection to thread-gripping positions.

4. A trap motion arranged between the spindle and delivery roller and including two rolls having intergeared connection, a portion of the periphery of each roll being cut away to provide a thread passage between the rolls when the rolls are in such relative positions as to cause the respective cut away portions to register, and means connected to one of the rolls and operative on breakage registry and clamp the thread between the peripheral edges of the rolls.

5. A trap motion arranged between the spindle and delivery roller and including two rolls having intergeared connection, a portion of the periphery of each roll being cut away to provide a thread passage between the rolls when the rolls are in such relative positions as to cause the respective cut away portions to register, and means connected to one of the rolls and operative on breakage of the thread beyond the delivery roll to simultaneously and similarly operate both rolls to move the cut away portions out of registry and clamp the thread between the peripheral edges of the rolls, the relation of the rolls being such as to increase the clamping eflect of the rolls on the thread under any drawing tendency on the thread.

6. A trap motion arranged between the spindle and delivery roller and including two rolls having intergeared connection, a portion of the periphery of each roll being cut away to provide a thread passage between the rolls when the rolls are in such relative positions as to cause the respective cut away portions to register, means connected to one of the rolls and operative on breakage of the thread beyond the delivery roller to simultaneously and similarly operate both rolls to move the cut away portions out of registry and clamp the thread between the peri heral edges of the rolls, and means where y the rolls may be locked at will in positions to maintain the thread recess between them.

7 A trap motion arranged between the spindle and delivery roller and including two rolls having intergeared connection, a portion of the periphery of each roll being cut away to provide a thread passage between the rolls when the rolls are in such relative positions as to cause the respective cut away portions to register, means connected to one of the rolls. and operative on breakage of the thread beyond the delivery roll to simultaneou sly and similarly operate both rollsto move the cut away portions out of registry and clamp the thread between the peripheral edges of the rolls, and a latch cooperating with one of the rolls when said rolls are in position to provide a thread recess between them.

8. A device for gripping the thread for the purpose of stopping the supply when a thread breaks on spinning and twisting machines, with swinging stop motion characterized in that the clamping rollers which are disposed between the delivery rollers and the creel, one of which clamping rollers is secured to p the swinging stop motion, have internally engaging teeth and segmental recesses, so that the thread passes, during normal working conditions, freely through the recesses, while it is gripped between "the surfaces of the rotating clamping rollers by the swinging stop motion when the thread breaks.

In testimony whereof I have signed my name to this specification.

J OHANNES VON TRU'MBACH. 

